A federal agency working to rein in the population of wild horses in the West should rely more on fertility control than roundups because it would be more effective, a National Academy of Sciences review said on Wednesday.

The critique of the U.S. Bureau of Land Management's (BLM) handling of 37,300 free-ranging horses and burros also faulted the agency for a lack of transparency and public involvement in key decisions about the federally protected animals.

A survey of thousands of peer-reviewed papers in scientific journals has found 97.1% agreed that climate change is caused by human activity.

Authors of the survey, published on Thursday in the journal Environmental Research Letters, said the finding of near unanimity provided a powerful rebuttal to climate contrarians who insist the science of climate change remains unsettled.

After more than 15 years of failures by scientists around the world and one outright fraud, biologists have finally created human stem cells by the same technique that produced Dolly the cloned sheep in 1996: They transplanted genetic material from an adult cell into an egg whose own DNA had been removed.

The result is a harvest of human embryonic stem cells, the seemingly magic cells capable of morphing into any of the 200-plus kinds that make up a person.

NASA's Cassini spacecraft has captured images of a monster hurricane at Saturn's north pole – a storm so vast and powerful it makes tropical cyclones on Earth look tame by comparison.

The storm's eye alone spans some 1,250 miles – about the distance from North Carolina's Outer Banks to central Kansas. Wind speeds at the inner eye wall have been clocked at 330 miles an hour. The storm extends for another 600 to 700 miles beyond the eye.

Astronomers have found three planets orbiting far-off stars that are close to Earth-sized and in the "habitable zone": a distance from their suns that makes the planets' surfaces neither too hot nor too cold, but just right.

One of the three planets orbits a star with the prosaic name Kepler-69. "Kepler-69 is a sun-like star," says , a research scientist at the Bay Area Environmental Research Institute who uses the , which is on a mission to search for Earth-like planets.

A new type of battery has been developed that, its creators say, could revolutionise the way we power consumer electronics and vehicles.

The University of Illinois team says its use of 3D-electrodes allows it to build "microbatteries" that are many times smaller than commercially available options, or the same size and many times more powerful.

It adds they can be recharged 1,000 times faster than competing tech. However, safety issues still remain.